Countably compact weakly Whyburn spaces
General Topology
2015-11-19 v2
Abstract
The weak Whyburn property is a generalization of the classical sequential property that has been studied by many authors. A space is weakly Whyburn if for every non-closed set there is a subset such that is a singleton. We prove that every countably compact Urysohn space of cardinality smaller than the continuum is weakly Whyburn and show that, consistently, the Urysohn assumption is essential. We also give conditions for a (countably compact) weak Whyburn space to be pseudoradial and construct a countably compact weakly Whyburn non-pseudoradial regular space, which solves a question asked by Bella in private communication.
Keywords
Cite
@article{arxiv.1505.06238,
title = {Countably compact weakly Whyburn spaces},
author = {Santi Spadaro},
journal= {arXiv preprint arXiv:1505.06238},
year = {2015}
}